1) Amygdalin 
A substance found in the pits of many fruits such as apricots and papayas, and in other foods. It has been tried in some countries as a treatment for cancer, but it has not been shown to work in clinical studies. Laetrile is not approved for use in the United States. Also called amygdalin.
A chemical derived from the almond seeds, papaya seeds thought by many alternative practitioners to have anti-cancer properties. It is also called amydalin. This is officially banned in the USA but samples are often smuggled into or manufactured in neighbouring countries where control on usage is far less strict. ... (16 Dec 1997) ... 
(la´ә-tril) trademark for a semisynthetic derivative of amygdalin, alleged to have antineoplastic properties.(la´ә-tril) amygdalin derived from crushed pits of certain fruits.
Type: Term Pronunciation: lā′ĕ-tril Definitions: 1. An allegedly antineoplastic drug consisting chiefly of amygdalin derived from apricot pits; no benficial effect has been proven.
[n] - a substance derived from amygdalin